Every one of the three has a semantic reason and should just be utilized to check message as pursues:
EM (Emphasized content): This is content that ought to be accentuated subsequently changing the significance of its specific circumstance.
STRONG (Strong importance): Can be utilized in titles, headings or passages to stress the word or expression that bears the most critical in the sentence. It can likewise be utilized to the importance the significance, or reality, of a word or expression.
SMALL (Small print): Used for disclaimers, clarifications and general de-stressing of the stamped content.
To style message as intense, italic or in a smaller font, conventional labels can be utilized and the styles connected with CSS code as opposed to mishandling semantic HTML5 elements.